Java EE Services

Naming
- A naming and directory service binds objects to names. A Java
EE application can locate an object by looking up its Java Naming and
Directory Interface (JNDI) name.

Security
- The Java Authorization Contract for Containers (JACC)
is a set of security contracts defined for the Java EE containers. Based on
the client’s identity, containers can restrict access to the container’s
resources and services.

Transaction management - A transaction is an indivisible unit
of work. For example, transferring funds between bank accounts is a transaction.
A transaction management service ensures that a transaction is either completed,
or is rolled back.

Message Service - Applications hosted on separate systems
can communicate with each other by exchanging messages using the Java™ Message
Service (JMS). JMS is an integral part of the Java EE platform and simplifies
the task of integrating heterogeneous enterprise applications.